/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.reark.reark.utils;

import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

public final class Preconditions {
    
    private Preconditions() {
    }

    public static void checkNotNull(@Nullable final Object object, @NonNull final String message) {
        if (object == null) {
            throw new NullPointerException(message);
        }
    }

    public static void checkNotNull(@Nullable final Object object) {
        checkNotNull(object, "Object cannot be null.");
    }

    @NonNull
    public static <T> T get(@Nullable final T object) {
        checkNotNull(object);

        return object;
    }

    public static void checkState(boolean precondition, @NonNull final String message) {
        if (!precondition) {
            throw new IllegalStateException(message);
        }
    }
}
